Hmm, yeah. I actually somewhat agree with you that the picture isn't your best work. The hair shape seems a bit weird, the lower thigh line seems crooked, her calves feels larger than they should be. Still, you did a fine job at the coloring. Is this the first time you do a highlight effect on hair coloring? The way you do it seems to fit well for your drawing style.

But I generally prefer not to do the hair sheen anymore. I like the way the 'flatter' colours look better (and looks more distinctly part of my 'style', if that's a thing). So i only really put in the hair sheen if the character's dark hair colour hides details and/or their hair is very intricate.